* [PATCH 1/1] block/nbd: micro-optimization in nbd request completion
@ 2012-06-06 14:15 Chetan Loke
0 siblings, 0 replies; only message in thread
From: Chetan Loke @ 2012-06-06 14:15 UTC (permalink / raw)
To: Paul.Clements, axboe, linux-kernel; +Cc: netdev, Chetan Loke
Add in-flight cmds to the tail. That way while searching(during request completion),we will always get a hit on the first element.
Signed-off-by: Chetan Loke <loke.chetan@gmail.com>
---
drivers/block/nbd.c | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/drivers/block/nbd.c b/drivers/block/nbd.c
index 061427a..8957b9f 100644
--- a/drivers/block/nbd.c
+++ b/drivers/block/nbd.c
@@ -481,7 +481,7 @@ static void nbd_handle_req(struct nbd_device *nbd, struct request *req)
nbd_end_request(req);
} else {
spin_lock(&nbd->queue_lock);
- list_add(&req->queuelist, &nbd->queue_head);
+ list_add_tail(&req->queuelist, &nbd->queue_head);
spin_unlock(&nbd->queue_lock);
}
--
1.7.5.2
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